2003 Nissan Altima catalytic converter

[quote:55b548c5fe="traderen"]Computer problem
2003 Nissan Altima 4 cyl Front Wheel Drive Automatic 101000 miles
----------------------------------------------------------------
My son's car has the check engine light on. The computer at auto zone said it is the o2 sensor. A mechanic said it is the catalytic converter and will cost $1,000.00 to fix it. hat should I do? Thanks.[/quote:55b548c5fe]try taking to another mechanic, or try to cheapist first.